Detail of "3971-54-8"

Reference

NMR characterization of dihydrosterculic acid and its methyl ester

All Rights Reserved.Some chemicals with cas registry numbers like 4675-61-0 and 3971-54-8 are also used. NMR characterization of dihydrosterculic acid and its methyl ester. Knothe, Gerhard (National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, Peoria, IL 61604, USA). Lipids, 41(4), 393-396 (English) 2006 AOCS Press. CODEN: LPDSAP. ISSN: 0024-4201. DOCUMENT TYPE: Journal CA Section: 9 (Biochemical Methods) Cyclopropane FA occur in nature in the phospholipids of bacterial membranes, in oils contg. cyclopropene FA, and in Litchi sinensis oil. Dihydrosterculic acid (2-octyl cyclopropaneoctanoic acid) and its Me ester were selected for 1H and 13C NMR anal. as compds. representative of cyclopropane FA. The 500 MHz 1H NMR spectra acquired with CDCl3 as solvent show two individual peaks at -0.30 and 0.60 ppm for the methylene protons of the cyclopropane ring. Assignments were made with the aid of 2D correlations. In accordance with previous literature, the upfield signal is assigned to the cis proton and the downfield signal to the trans proton. This signal of the trans proton is resolved from the peak of the two methine protons of the cyclopropane ring, which is located at 0.68 ppm. The four protons attached to the two methylene carbons a to the cyclopropane ring also show a split signal. Two of these protons, one from each methylene moiety, display a distinct shift at 1.17 ppm, and the signal of the other two protons is obsd. at 1.40 ppm, within the broad methylene peak. The characteristic peaks in the 13C spectra are also assigned. .

Large-scale cyclopropanation

Large-scale cyclopropanation. Repic, Oljan; Lee, Paul G.; Giger, Urs (Chem. Res. Dev. Pharm. Div., Sandoz, Inc., East Hanover, NJ 07936, USA). Org.Several substances with their cas registry numbers 3971-54-8 and 112-62-9 may be metioned in this study. Prep. Proced. Int., 16(1), 25-30 (English) 1984. CODEN: OPPIAK. ISSN: 0030-4948. DOCUMENT TYPE: Journal CA Section: 24 (Alicyclic Compounds) Ultrasound and Zn cone stirrers were used in the Simmons-Smith reaction of Me oleate to give Me 8-(2-octylcyclopropyl)octanoate isomers. .